Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

50.2°F

Measurement Time: Monday, January 12, 2026, 12:30 AM PST

Temperature Locations

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Local Points of Interest

Stanislaus National Forest; Colfax Spring, CA; Mather, CA; Harden Flat, CA

Tuolumne River

Station Name: TUOLUMNE R BL EARLY INTAKE NR MATHER CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 2,369 feet

Nearest Address:
Cherry Lake Rd
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.8815908, -119.9701824

Nearby Water Temperatures

Tuolumne River, Groveland, CA (1.3 mi)
Cherry Creek, Groveland, CA (6.6 mi)
Tuolumne River, Groveland, CA (10.1 mi)
Tuolumne River, Groveland, CA (17.1 mi)
Merced River, Yosemite Valley, CA (24.7 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (51.3 mi)
Deadman Creek, Mammoth Lakes, CA (57 mi)
Hot Creek, Mammoth Lakes, CA (62.8 mi)
Hot Creek, Mammoth Lakes, CA (63.4 mi)
San Joaquin River, Friant, CA (63.4 mi)
Hot Creek, Mammoth Lakes, CA (64.6 mi)
Trout Creek, South Lake Tahoe, CA (71.7 mi)
Upper Truckee River, South Lake Tahoe, CA (71.9 mi)
General Creek, Tahoma, CA (81.3 mi)
South Fork American River, Rescue, CA (82.9 mi)

Weather for Groveland, California

Current Weather

47.1°F
Sunny
Sunny
43.1°F
47.1°F
30%
ENE 5.4 mph
11.3 mph
43.1°F
17.2°F
0 in
0%
8 mi
1027 mbar
0.2

Five Day Weather Forecast

Sunny
Mon
H: 61°F
L: 44°F
Sunny
Tue
H: 63°F
L: 45°F
Sunny
Wed
H: 64°F
L: 46°F
Sunny
Thu
H: 65°F
L: 52°F
Sunny
Fri
H: 63°F
L: 48°F

Air Quality

AQI: 1 - Good
PM2.5: 7.25 μg/m3
PM10: 7.65 μg/m3
Carbon Monoxide: 159.85 μg/m3
Nitrogen Dioxide: 6.25 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 59 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 12:08 AM
Sunset: 5:02 PM
Daylight: 9 hrs 47 mins
Moonrise: 2:08 AM
Moon Transit: 7:11 AM
Moonset: 12:10 AM
Moon Phase: Last Quarter
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

6:41 AM - 9:11 AM
2:57 PM - 5:27 PM

Minor Periods

11:40 AM - 1:10 PM
1:38 AM - 3:08 AM

Action Rating: 3 out of 5

Dense Fog Advisory issued January 11 at 9:50PM PST until January 12 at 11:00AM PST by NWS Hanford CA

Effective: Sun January 11, 2026, 9:50 PM
Expires: Mon January 12, 2026, 6:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. Visibilities below 200 feet expected in some areas. * WHERE...A portion of central California. * WHEN...Until 11 AM PST Monday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways include, but are not limited to, Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 168, 180, and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Monday, January 12, 2026

Weather Forecast

Sunny
60.8°F
44.1°F
51.6°F
46%
0 in
0%
0%
5.8 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 6.95 μg/m3
PM10: 7.27 μg/m3
Carbon Monoxide: 168.29 μg/m3
Nitrogen Dioxide: 8.05 μg/m3
Sulphur Dioxide: 2.12 μg/m3
Ozone: 58.4 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 12:08 AM
Sunset: 5:02 PM
Daylight: 9 hrs 47 mins
Moonrise: 2:08 AM
Moon Transit: 7:11 AM
Moonset: 12:10 AM
Moon Phase: Last Quarter
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

6:41 AM - 9:11 AM
2:57 PM - 5:27 PM

Minor Periods

11:40 AM - 1:10 PM
1:38 AM - 3:08 AM

Action Rating: 3 out of 5

Tuesday, January 13, 2026

Weather Forecast

Sunny
62.8°F
45.1°F
54.6°F
47%
0 in
0%
0%
6.3 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 4.24 μg/m3
PM10: 4.44 μg/m3
Carbon Monoxide: 159.69 μg/m3
Nitrogen Dioxide: 6.43 μg/m3
Sulphur Dioxide: 1.93 μg/m3
Ozone: 58.32 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 12:08 AM
Sunset: 5:03 PM
Daylight: 9 hrs 48 mins
Moonrise: 3:08 AM
Moon Transit: 7:57 AM
Moonset: 12:42 AM
Moon Phase: Waning Crescent
Moon Illumination: 15.9%

Best Times for Fishing or Hunting

Major Periods

7:27 AM - 9:57 AM
3:44 PM - 6:14 PM

Minor Periods

12:12 AM - 1:42 PM
2:38 AM - 4:08 AM

Action Rating: 3 out of 5

Wednesday, January 14, 2026

Weather Forecast

Sunny
64°F
46.4°F
54.2°F
54%
0 in
0%
0%
5.4 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.81 μg/m3
PM10: 3.98 μg/m3
Carbon Monoxide: 164.69 μg/m3
Nitrogen Dioxide: 7.1 μg/m3
Sulphur Dioxide: 1.89 μg/m3
Ozone: 59.76 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:09 AM
Sunset: 5:04 PM
Daylight: 9 hrs 49 mins
Moonrise: 4:09 AM
Moon Transit: 8:46 AM
Moonset: 1:21 PM
Moon Phase: Waning Crescent
Moon Illumination: 8.5%

Best Times for Fishing or Hunting

Major Periods

8:16 AM - 10:46 AM
4:33 PM - 7:03 PM

Minor Periods

12:51 AM - 2:21 PM
3:39 AM - 5:09 AM

Action Rating: 2 out of 5

Thursday, January 15, 2026

Weather Forecast

Sunny
64.8°F
52.2°F
56.6°F
49%
0 in
0%
0%
6.3 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.57 μg/m3
PM10: 3.75 μg/m3
Carbon Monoxide: 159.49 μg/m3
Nitrogen Dioxide: 6.61 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 63.2 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:09 AM
Sunset: 5:05 PM
Daylight: 9 hrs 51 mins
Moonrise: 5:07 AM
Moon Transit: 9:37 AM
Moonset: 2:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

5:25 PM - 7:55 PM
9:07 AM - 11:37 AM

Minor Periods

1:38 PM - 3:08 PM
4:37 AM - 6:07 AM

Action Rating: 3 out of 5

Friday, January 16, 2026

Weather Forecast

Sunny
62.7°F
47.9°F
52.9°F
38%
0 in
0%
0%
6.7 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.45 μg/m3
PM10: 3.55 μg/m3
Carbon Monoxide: 170.85 μg/m3
Nitrogen Dioxide: 5.05 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 67 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:09 AM
Sunset: 5:06 PM
Daylight: 9 hrs 52 mins
Moonrise: 6:00 AM
Moon Transit: 10:30 AM
Moonset: 3:02 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

6:18 PM - 8:48 PM
10:00 AM - 12:30 AM

Minor Periods

2:32 PM - 4:02 PM
5:30 AM - 7:00 AM

Action Rating: 3 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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